.back-invite-btn{background:rgba(12,10,14,.42);color:#fff;border-color:rgba(255,255,255,.28);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 6px 18px rgba(0,0,0,.22);opacity:0;transform:translateY(-10px);pointer-events:none;transition:opacity .35s ease,transform .35s cubic-bezier(.16,1,.3,1),border-color .2s ease,box-shadow .25s ease}.back-invite-btn.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}.back-invite-btn:hover{border-color:var(--bb-accent,#dcb446);box-shadow:0 8px 24px rgba(0,0,0,.3),0 0 0 3px color-mix(in srgb,var(--bb-accent,#dcb446) 28%,transparent)}.back-invite-btn:active{transform:scale(.94)}@media (prefers-reduced-motion:reduce){.back-invite-btn,.back-invite-btn.is-visible{transition:none;transform:none}}